Hello dear helpers,

i used the following instruction: http://www.backtrack-linux.org/wiki/...Persistent_USB
Now i want to format the partitions but:
>> root@root:~# mkfs.ext3 -b 4096 -L casper-rw /dev/sdb2
mke2fs 1.41.11 (14-Mar-2010)
Could not stat /dev/sdb2 --- No such file or directory

The device apparently does not exist; did you specify it correctly? <<

PLEASE can any good soul help a Linux-noob to get his Persistent BT-USB